sway: use swaynotificationcenter from master

branch, fixes scaling issue, see:

https://github.com/ErikReider/SwayNotificationCenter/issues/108#issuecomment-1180844131

modules/sway/default.nix

@@ -60,7 +60,7 @@ in
           kanshi
           mako
           slurp
-          swaynotificationcenter
+          swaynotificationcenter-master
           swayidle
           swaylock
           swaybg

overlays/swaynotificationcenter-remove-post-install.patch

@@ -0,0 +1,11 @@
+diff --git a/meson.build b/meson.build
+index 6557624..f82460e 100644
+--- a/meson.build
++++ b/meson.build
+@@ -126,6 +126,3 @@ if get_option('man-pages')
+     endforeach
+   endif
+ endif
+-
+-# Run the postinstall script when installing
+-meson.add_install_script('build-aux/meson/postinstall.py')

overlays/swaynotificationcenter.nix

@@ -0,0 +1,14 @@
+final: prev: {
+  swaynotificationcenter-master = prev.swaynotificationcenter.overrideAttrs (oldAttrs: {
+    version = "unstable-2022-07-11";
+    src = prev.fetchFromGitHub {
+      owner = "ErikReider";
+      repo = "SwayNotificationCenter";
+      rev = "4f142f54f6af6882338f5ce2e9ac529be523f841";
+      sha256 = "sha256-BF2EZ/0gPtBRAIFvAGhHkp+0H9EA7zYjN8ujDmdHfo0=";
+    };
+    patches = [
+      ./swaynotificationcenter-remove-post-install.patch
+    ];
+  });
+}